5
3
4
9
1
8
6
2
9
2
1
5
4
3
3
8
2
6
3
7
4
8
5

This Sudoku Puzzle has 74 steps and it is solved using Naked Single, Hidden Single, Locked Pair, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Triple, Hidden Pair, Empty Rectangle, undefined, AIC, Full House techniques.

Naked Single Explanation
Hidden Single Explanation
Hidden Pair Explanation
Locked Candidates Explanation
Locked Candidates Explanation
Full House Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Row 2 / Column 9 → 7 (Naked Single)
  2. Row 2 / Column 3 → 6 (Naked Single)
  3. Row 6 / Column 3 → 7 (Naked Single)
  4. Row 8 / Column 3 → 9 (Hidden Single)
  5. Locked Pair: 2,8 in r2c12 => r2c5,r3c12<>8, r1c2<>2
  6. Locked Candidates Type 1 (Pointing): 5 in b7 => r45c2<>5
  7. Locked Candidates Type 2 (Claiming): 1 in c3 => r4c12,r5c2<>1
  8. Locked Candidates Type 2 (Claiming): 9 in c9 => r4c78,r6c78<>9
  9. Naked Triple: 6,7,8 in r5c246 => r5c8<>6, r5c8<>7
  10. Row 4 / Column 8 → 7 (Hidden Single)
  11. Hidden Pair: 2,6 in r1c46 => r1c46<>4, r1c46<>7
  12. Locked Candidates Type 1 (Pointing): 4 in b2 => r4689c5<>4
  13. Locked Candidates Type 1 (Pointing): 4 in b5 => r4c12<>4
  14. Empty Rectangle: 1 in b1 (r7c28) => r3c8<>1
  15. Locked Candidates Type 1 (Pointing): 1 in b3 => r1c2<>1
  16. XYZ-Wing: 2/6/8 in r24c1,r5c2 => r6c1<>8
  17. AIC: 1 1- r8c7 -2- r7c8 =2= r6c8 =6= r9c8 -6- r8c9 -1 => r79c8,r8c125,r9c7<>1
  18. Row 7 / Column 2 → 1 (Hidden Single)
  19. Row 9 / Column 5 → 1 (Hidden Single)
  20. Row 3 / Column 1 → 1 (Hidden Single)
  21. Row 7 / Column 4 → 5 (Hidden Single)
  22. Row 8 / Column 5 → 7 (Naked Single)
  23. Row 1 / Column 5 → 4 (Naked Single)
  24. Row 8 / Column 2 → 5 (Hidden Single)
  25. Row 1 / Column 4 → 2 (Hidden Single)
  26. Row 1 / Column 6 → 6 (Naked Single)
  27. Row 1 / Column 2 → 7 (Hidden Single)
  28. Row 3 / Column 2 → 9 (Naked Single)
  29. Row 9 / Column 1 → 7 (Hidden Single)
  30. Row 2 / Column 8 → 4 (Hidden Single)
  31. Locked Candidates Type 1 (Pointing): 9 in b8 => r4c6<>9
  32. 2-String Kite: 6 in r6c8,r8c1 (connected by r8c9,r9c8) => r6c1<>6
  33. W-Wing: 7/8 in r3c4,r5c6 connected by 8 in r9c46 => r3c6,r5c4<>7
  34. Row 3 / Column 4 → 7 (Hidden Single)
  35. Row 5 / Column 6 → 7 (Hidden Single)
  36. XY-Wing: 1/2/9 in r18c7,r7c8 => r1c8,r9c7<>9
  37. Row 1 / Column 8 → 1 (Naked Single)
  38. Row 1 / Column 7 → 9 (Full House)
  39. Row 9 / Column 7 → 3 (Naked Single)
  40. Row 5 / Column 8 → 5 (Naked Single)
  41. Row 2 / Column 7 → 5 (Naked Single)
  42. Row 3 / Column 8 → 3 (Full House)
  43. Row 5 / Column 3 → 1 (Naked Single)
  44. Row 4 / Column 3 → 5 (Full House)
  45. Row 2 / Column 5 → 3 (Naked Single)
  46. Row 3 / Column 6 → 8 (Naked Single)
  47. Row 3 / Column 5 → 5 (Full House)
  48. Row 4 / Column 6 → 3 (Hidden Single)
  49. Row 6 / Column 2 → 3 (Hidden Single)
  50. Row 9 / Column 4 → 8 (Hidden Single)
  51. Row 5 / Column 4 → 6 (Naked Single)
  52. Row 4 / Column 4 → 4 (Full House)
  53. Row 5 / Column 2 → 8 (Full House)
  54. Row 2 / Column 2 → 2 (Naked Single)
  55. Row 2 / Column 1 → 8 (Full House)
  56. Row 4 / Column 2 → 6 (Naked Single)
  57. Row 9 / Column 2 → 4 (Full House)
  58. Row 8 / Column 1 → 6 (Full House)
  59. Row 4 / Column 1 → 2 (Naked Single)
  60. Row 6 / Column 1 → 4 (Full House)
  61. Row 9 / Column 6 → 9 (Naked Single)
  62. Row 9 / Column 8 → 6 (Full House)
  63. Row 8 / Column 9 → 1 (Naked Single)
  64. Row 7 / Column 6 → 2 (Naked Single)
  65. Row 7 / Column 8 → 9 (Full House)
  66. Row 6 / Column 8 → 2 (Full House)
  67. Row 8 / Column 7 → 2 (Full House)
  68. Row 8 / Column 6 → 4 (Full House)
  69. Row 4 / Column 9 → 9 (Naked Single)
  70. Row 6 / Column 9 → 6 (Full House)
  71. Row 6 / Column 7 → 8 (Naked Single)
  72. Row 4 / Column 7 → 1 (Full House)
  73. Row 4 / Column 5 → 8 (Full House)
  74. Row 6 / Column 5 → 9 (Full House)
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